NBC saw its prime-time lineup sink to season lows and a series low last night, but NBC has owned Monday nights this season and claimed another nightly win, based on Nielsen overnights for the key 18-49 demo.

TVbytheNumbers.com reports that NBC’s two-hour installment of "The Voice" hit a season low with a 3.6 average rating in viewers 18-49, losing a significant chunk of viewers from last week’s 4.3 average. "The Voice" was still the top show on broadcast prime.

NBC’s "The Blacklist," meanwhile, dipped to a series-low 2.9, shedding two-tenths of a point from a week ago.

Second-place Fox had its own problems, with "Bones" returning from a hiatus to a 2.0 average in 18-49, off two-tenths from its previous original, while "Sleepy Hollow" returned to a series-low 2.5, also slipping two-tenths from the show’s previous original.

ABC finished a competitive third overall, with its two-hour "Dancing with the Stars" matching last week’s 2.1 average in the 18-49 demo and "Castle" surging three-tenths to a 2.4.

CBS drifted to fourth place, even with "How I Met Your Mother" climbing four-tenths from a week ago to a 3.4 average in viewers 18-49. "Mike & Molly" had its season premiere, producing a 2.6 rating — off the pace from last year’s 3.1 but better than the 1.9 delivered by last season’s finale.

"2 Broke Girls" dipped one-tenth to a 2.6 in adults 18-49, and "Mom" also fell one-tenth, to a 2.0. "Hostages" continued to struggle at 10 p.m., tying its series low with a 1.1 after managing a 1.2 a week ago.

For prime time overall, NBC led the pack with a 3.4 average in the 18-49 demo, ahead of Fox (2.3 average), ABC (2.2), CBS (2.1) and Univision (1.3). ABC came out on top in total viewers with 13.6 million, topping NBC (11.2 million), CBS (7.1 million), Fox (7.0 million) and Univision (3.4 million).